Commitments and contingencies (Details 1) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues, Total		$ 57,875,707	$ 57,116,202	$ 65,559,078
Impairment loss on long-lived assets		(2,000,000)	0	0
Loss from operations		1,823,302	8,468,064	6,461,059
Net loss		3,960,501	7,518,701	6,265,358
Depreciation		5,765,580	5,501,491	5,355,771
CW Bali [Member]
Revenues, Total		91,311	368,012	471,919
Impairment loss on long-lived assets	$ (2,000,000)	(2,000,000)	0	0
Loss from operations		(2,744,361)	(483,544)	(458,393)
Net loss		(2,547,332)	(860,783)	(585,744)
Depreciation		$ 450,736	$ 304,673	$ 279,037